Heat transfer device



June 2, 1931.

D. S. JACOBUS HEAT TRANSFER DEVICE Original Filed Sept. 4. 1918 3Sheets-Sheet l INVEN OR ATTORNEYS.

June 2, 1931. D. s. JACOBUS 1,808,159

HEAT TRANSFER DEVICE Original Filed Sept. 4. 191a a Sheets-Sheet 2INVENTOR 5.

June 2, 1931. D. s. JACDOBUS 1,808,169

HEAT TRANSFER DEVICE Original Filed- Sept. 4, 1918 3 Sheets-Sheet 5 FiLZ INVENTQR ATTORNEYS.

Patented June 2, 1931 UNITED STATS PATENT OFFICE DAVID s. .moonns, orMONTCLAIR, NEWJERSEY, assrenon TO THE BABCOCK & WILCOX COMPANY, orBAYONNE, new JERSEY, A CORPORATION OF NEW JERSEY HEAT TRANSFER DEVICEOriginal application filed September 4, 1918, Serial No. 252,550.Divided and this application filed .Tune 20, 1929. Seria1 No. 372,269.

This invention relates to a novel and improved form of heat transferdevice, and is a division of my copending application Serial No.252,550, filed September 4, 1918, which has matured into Patent No.1,729,-

259, dated September 24:, 1929. The novel features of the invention willbe best understood from the following description and the annexeddrawings, in which Fig. 1 is a vertical sectional View through aneconomizer constructed according to the invention. I

Fig. 2 is a sectional view of the structure shown in Fig. 1, and takenapproximately,

15 on the line 22 of Fig. 1.

Fig. 3 is a fragmentary sectional view on an enlarged scale, showing therelation of the headers at one end of the tubes.

Fig. 4 is a fragmentary sectional View taken approximately on the line Hof Fig. 3. For the purposes of illustration, I have shown the inventionas applied to an encon omizer 1 disposed above a boiler having two steamand water drums 2 and 3, from which hot gases pass upwardly throughflues 4 and 5. Disposed in the flue 4 is the economizer and the hotgases after passing over the tubes of the economizer are drawn outwardlyas by a fan 6 and discharged through a fine 7. A similar arrangement maybe used in the flue 5.

The economizer comprises a plurality of tubes 8 extending across the gaspass formed by the line, and connected at their opposite ends to aplurality of headers 9. 'These headers are arranged in groups as plainlyshown in Figs. 2, 3 and at. In these figures the groups are shown aseach comprising a pair of headers placed close together and withsufiicient space between the headers of adjacent groups to permit thepassage of a tube 8. The tubes are arranged in trans, verse rows andtheir ends are disposed in tube holes in the faces of the headers, theends of the tubes being bent as plainly shown in Fig. 3, so that thegreater portion of the tube lengths are substantially uniformly spacedapart in the row, and this spacing is preferably less than a tubediameter or no greater than such a diameter. ,The tubes in adjacent rowsare staggered,

as plainly shown.

In each header there are shown two longitudinal rows of tube holes, theholesin each row forming a substantially straight line longitudinally ofthe header. In each of these rows the tubes are arranged in pairs with aspace between the pairs sufficient to permit passage of one of the tubes8, so that when a tube in any row is to be removed or replaced, it maybe easily moved into a space 10 between adjacent transverse rows, andthen moved horizontally or transversely with respect to the headers intothe space between groups of headers- The tubes in one row have theirends bent as indicated atll and 12, one tube end being bent more thanthe other so as to bring the tubes in the longitudinal row in staggeredrelation with respect to each other. In the other longitudinal row ofthe same header the tube'ends are bent as indicated at 13 and 14, thebend 13 being a reverse bend and the bend 14 being a simple bend or inone direction only. By this arrangement the staggered effect is obtainedin all rows, andv at the same timethe" tube ends may enter thecylindrical face 15 of a header substantially normal thereto and alsodirected towards a handhole l6 providedon the opposite side ofa header.Such handholes may be provided with the usual fittings 17. This methodof bending the tube ends also lends'itself to the arrangementof headersshown, two of the tube endsll and 12 being used on headers which'are onopposite sides of the space between groups, while the ends of the formindicated at 13 and 1d are used on the adjacent partsof headers in agroup. The result is a substantially uniform spacing of tubes completelyacross the bank formed by a plurality of groups of headers and theirassociated tubes.

I claim 1. In a heat transfer device, a gas pass, a plurality of headerson each side of the pass and connected by tubes extending there across,the headers on one side of the pass being disposed in groups spacedapart, with the headers in each group closely adjacent each other, andwith some of the tubes bent at their ends to bring them opposite thespace between said groups. I

2. In a heat transfer device, a gas'pass, a plurality of headers oneach'side of the pass and connected by tubes extending there: across,the headers on one side of the pass being disposed in groups spacedapart, with the headers in each group-closely adjacent each other, withsome of the tubes bent at their ends to bring them opposite"t'he spacetw Said swap th tub s csne cte t headers in adjacent" groups beingarranged in rows extending transversely of the head-- ers, and. thetubes in one of said rows being substantially unlformly spaced.

3. In a heat transfer device, a gas pass, a

plurality of headers on each side of the pass and connected by tubesextending thereacross, the headers on one side of the pass beingdlsposed in groups spacedapart, with r the headers in each group closelyadjacent each other, with some 'of thetubes bent at their ends to bringthem opposite the space between said groups, the tubes connected toheaders in adjacent groups being arranged in rowsextending transverselyof the head ers, the tuhes in one of said rows being sub stantiallyuniformly spaced, and the tubes in adjacent transverse rows beingstaggered with respect to each other.

4:. In a heat transfer device, a gas pass, a plurality of headers oneach side of the pass and connected by tubes extending there'-.

across, the headers on one side of the pass being disposed ingroups'spac'ed apart-with the headers in each group closely adjacent"each other, and with someof the tubes bent bent in the same direction indifferent amounts. I

7. Ina heat transfer device, a'row of headers arranged in pairs with thetwo headers in each pair closely adjacent each the nd. Pa ews, apart ne; row, theheaders in each pair having curved faces with twolongitudinally extending rows of tube holes therein, the tubes havingtheir ends entered, in said holes, the tube endsentering adjacent rowsofholes inthe twoheadrs being alternately bent in reverse, and simplebends, and the tubes entering the other rows of holes being alternatelybent in the same direction but in different amounts, said header facesbeing curved and1 the tube ends enteringsaid holes substanf-j 'tiallynormal to the faces.

'8. In a'heat transfer device, a gas pass,

a plurality of headers on each side of the pass and connected by tubesextending thereacross, the headers onion ejside of the;

pass being disposed in groups-spaced apart,

DAVID, s JAGOBUS- at their ends to' bring them opposite the I spacebetween said'g roups, the tubes connectedto headers in adjacent groupsbeing arranged in pairs" of rows extending transversely of, the headers.V r

5. In a heat transfer device, a gas pass, a plurality of headers on eachside' of theipass and connected by tubes extending thereacross, theheaders on one side of the pass being disposed in groups spaced apart,with the headers in each group closely adjacent each other, and withsome of the :tubes bent at their ends to bring them opposite the spacebetween said groups,the tubes connected to headers in adjacent groupsbeing arranged in pairs of rows extending trans;- versely of theheaders, the tubes in each rowbeing spaced apart a distanceless than atube diameter and the distance between adjacent pairs of rows exceedinga tube diameter. V

6, In a heat transfer device, a row of headers arranged in pairs withthe two headers in each pairclosely adjacenteach other and'the pairsspaced apart in'the I,

19W he er n a Pa r levi sv u d

